diff options
| author | Xiangliang Yu <yuxiangl@marvell.com> | 2011-06-30 18:27:36 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-07-26 12:59:55 +0400 |
| commit | 6f8ac161b8b3332a9d96d6650ed3bae81baab30b (patch) | |
| tree | 2cd89c7bbe9678ad5ec38cd9a15df726e01731a4 /drivers/scsi/mvsas/mv_init.c | |
| parent | e144f7ef49ec85e9dfdf130f3a9a2372fe5fe39b (diff) | |
| download | linux-6f8ac161b8b3332a9d96d6650ed3bae81baab30b.tar.xz | |
[SCSI] mvsas: Add support for interrupt tasklet
Add support for interrupt tasklet, which will improve performance.
Correct spelling of "20011"
[jejb: simplified ifdefs and fixed unused variable problem]
Signed-off-by: Xiangliang Yu <yuxiangl@marvell.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/mvsas/mv_init.c')
| -rw-r--r-- | drivers/scsi/mvsas/mv_init.c | 45 |
1 files changed, 28 insertions, 17 deletions
diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c index cf4aaa9db5fe..4e9af66fd1d3 100644 --- a/drivers/scsi/mvsas/mv_init.c +++ b/drivers/scsi/mvsas/mv_init.c @@ -170,11 +170,9 @@ static void mvs_free(struct mvs_info *mvi) kfree(mvi); } -#ifdef MVS_USE_TASKLET -struct tasklet_struct mv_tasklet; +#ifdef CONFIG_SCSI_MVSAS_TASKLET static void mvs_tasklet(unsigned long opaque) { - unsigned long flags; u32 stat; u16 core_nr, i = 0; @@ -187,35 +185,49 @@ static void mvs_tasklet(unsigned long opaque) if (unlikely(!mvi)) BUG_ON(1); + stat = MVS_CHIP_DISP->isr_status(mvi, mvi->pdev->irq); + if (!stat) + goto out; + for (i = 0; i < core_nr; i++) { mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[i]; - stat = MVS_CHIP_DISP->isr_status(mvi, mvi->irq); - if (stat) - MVS_CHIP_DISP->isr(mvi, mvi->irq, stat); + MVS_CHIP_DISP->isr(mvi, mvi->pdev->irq, stat); } +out: + MVS_CHIP_DISP->interrupt_enable(mvi); } #endif static irqreturn_t mvs_interrupt(int irq, void *opaque) { - u32 core_nr, i = 0; + u32 core_nr; u32 stat; struct mvs_info *mvi; struct sas_ha_struct *sha = opaque; +#ifndef CONFIG_SCSI_MVSAS_TASKLET + u32 i; +#endif core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host; mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[0]; if (unlikely(!mvi)) return IRQ_NONE; +#ifdef CONFIG_SCSI_MVSAS_TASKLET + MVS_CHIP_DISP->interrupt_disable(mvi); +#endif stat = MVS_CHIP_DISP->isr_status(mvi, irq); - if (!stat) + if (!stat) { + #ifdef CONFIG_SCSI_MVSAS_TASKLET + MVS_CHIP_DISP->interrupt_enable(mvi); + #endif return IRQ_NONE; + } -#ifdef MVS_USE_TASKLET - tasklet_schedule(&mv_tasklet); +#ifdef CONFIG_SCSI_MVSAS_TASKLET + tasklet_schedule(&((struct mvs_prv_info *)sha->lldd_ha)->mv_tasklet); #else for (i = 0; i < core_nr; i++) { mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[i]; @@ -388,9 +400,6 @@ static struct mvs_info *__devinit mvs_pci_alloc(struct pci_dev *pdev, mvi->id = id; mvi->sas = sha; mvi->shost = shost; -#ifdef MVS_USE_TASKLET - tasklet_init(&mv_tasklet, mvs_tasklet, (unsigned long)sha); -#endif mvi->tags = kzalloc(MVS_CHIP_SLOT_SZ>>3, GFP_KERNEL); if (!mvi->tags) @@ -535,6 +544,7 @@ static int __devinit mvs_pci_init(struct pci_dev *pdev, { unsigned int rc, nhost = 0; struct mvs_info *mvi; + struct mvs_prv_info *mpi; irq_handler_t irq_handler = mvs_interrupt; struct Scsi_Host *shost = NULL; const struct mvs_chip_info *chip; @@ -599,8 +609,9 @@ static int __devinit mvs_pci_init(struct pci_dev *pdev, } nhost++; } while (nhost < chip->n_host); -#ifdef MVS_USE_TASKLET - tasklet_init(&mv_tasklet, mvs_tasklet, + mpi = (struct mvs_prv_info *)(SHOST_TO_SAS_HA(shost)->lldd_ha); +#ifdef CONFIG_SCSI_MVSAS_TASKLET + tasklet_init(&(mpi->mv_tasklet), mvs_tasklet, (unsigned long)SHOST_TO_SAS_HA(shost)); #endif @@ -645,8 +656,8 @@ static void __devexit mvs_pci_remove(struct pci_dev *pdev) core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host; mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[0]; -#ifdef MVS_USE_TASKLET - tasklet_kill(&mv_tasklet); +#ifdef CONFIG_SCSI_MVSAS_TASKLET + tasklet_kill(&((struct mvs_prv_info *)sha->lldd_ha)->mv_tasklet); #endif pci_set_drvdata(pdev, NULL); |